July is one of the warmer months of the year in Penzance, with average highs near 17°C and lows around 15.6°C (mean 16.3°C). It is one of the drier months, averaging 65 mm of rainfall and 87% relative humidity across the period.
July is one of the warmer months of the year in Penzance. Across 45 years of records, the warmest July in Penzance was 1983 — when the month averaged 18.2°C — while the coldest was 1988 at 14.7°C. Typical July days reach 17°C with nights near 15.6°C. The long-term trend is warming, about 0.2°C per decade.
July is one of the drier months in Penzance, averaging 65 mm of rainfall. The wettest July on record was 2009 with 177 mm, while the driest was 1999 at 13 mm.
Relative humidity in Penzance during July averages 87%. The most humid July was 1991 at 91%, and the least humid was 1984 at 83%.
July receives about 5.4 kWh/m²/day of solar energy in Penzance. The sunniest July was 1990 at 6.6 kWh/m²/day, and the cloudiest was 2003 at 4.7.
Average wind speed in Penzance during July is 5.1 m/s. The windiest July was 2009 at 6.7 m/s, while the calmest was 2018 at 3.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.3°C | 16.0°C | 16.1°C | 16.6°C | 16.7°C | +0.4°C |
| Avg High | 17.1°C | 16.7°C | 16.8°C | 17.3°C | 17.3°C | +0.2°C |
| Avg Low | 15.6°C | 15.4°C | 15.5°C | 15.9°C | 16.1°C | +0.5°C |
| Avg Rain | 50 mm | 49 mm | 90 mm | 68 mm | 68 mm | +18 mm |
July temperatures in Penzance have risen by about 0.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 10.7°C (1997) to a record high of 24.1°C (1983).
Rainfall in July is one of the drier months, averaging 65 mm, with a wettest year of 177 mm.
One of the best times to visit Penzance
July is one of the best times to visit Penzance. Expect days averaging 17°C and nights around 15.6°C (mean 16.3°C) — warmer than Penzance's yearly average — with moderate rainfall (65 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.2°C | 17.6°C | 17.0°C | 21.6°C | 15.6°C | 41 mm | 86% | 5 m/s | 5.6 |
| 2024 | 16.7°C | 16.1°C | 15.4°C | 19.4°C | 13.1°C | 122 mm | 87% | 5 m/s | 5.2 |
| 2023 | 17.0°C | 16.6°C | 16.1°C | 18.0°C | 14.3°C | 95 mm | 86% | 6.2 m/s | 5.1 |
| 2022 | 18.1°C | 17.4°C | 16.6°C | 21.0°C | 14.5°C | 17 mm | 85% | 4.7 m/s | 5.9 |
| 2021 | 17.7°C | 16.9°C | 16.2°C | 21.6°C | 13.8°C | 87 mm | 88% | 4.9 m/s | 5.6 |
| 2020 | 16.2°C | 15.6°C | 15.0°C | 18.4°C | 13.7°C | 45 mm | 87% | 5.5 m/s | 5.5 |
| 2019 | 17.9°C | 17.2°C | 16.5°C | 19.3°C | 14.7°C | 44 mm | 86% | 4.6 m/s | 6 |
| 2018 | 19.0°C | 18.1°C | 17.3°C | 20.2°C | 15.3°C | 57 mm | 85% | 3.9 m/s | 5.9 |
| 2017 | 16.8°C | 16.2°C | 15.6°C | 18.2°C | 14.1°C | 110 mm | 88% | 5.2 m/s | 5.2 |
| 2016 | 16.9°C | 16.3°C | 15.7°C | 20.0°C | 13.8°C | 38 mm | 87% | 5.1 m/s | 5.3 |
| 2015 | 16.5°C | 16.0°C | 15.4°C | 17.7°C | 13.3°C | 109 mm | 84% | 6 m/s | 5.3 |
| 2014 | 18.3°C | 17.6°C | 17.0°C | 22.2°C | 14.6°C | 44 mm | 85% | 4.6 m/s | 5.6 |
| 2013 | 18.0°C | 17.1°C | 16.3°C | 21.0°C | 13.6°C | 36 mm | 87% | 4.4 m/s | 6.4 |
| 2012 | 15.9°C | 15.3°C | 14.7°C | 18.7°C | 13.5°C | 100 mm | 87% | 5.5 m/s | 5.3 |
| 2011 | 16.1°C | 15.4°C | 14.7°C | 17.5°C | 13.1°C | 56 mm | 86% | 4.9 m/s | 5.5 |
| 2010 | 17.1°C | 16.5°C | 15.9°C | 18.5°C | 14.6°C | 85 mm | 87% | 5.5 m/s | 5 |
| 2009 🌧️ | 16.7°C | 16.1°C | 15.6°C | 18.9°C | 14.0°C | 177 mm | 85% | 6.7 m/s | 5 |
| 2008 | 16.2°C | 15.7°C | 15.1°C | 18.7°C | 13.2°C | 127 mm | 88% | 6 m/s | 5.1 |
| 2007 | 16.0°C | 15.4°C | 14.9°C | 16.9°C | 13.0°C | 106 mm | 86% | 6 m/s | 5.3 |
| 2006 | 18.7°C | 17.9°C | 17.1°C | 20.5°C | 15.7°C | 46 mm | 87% | 4.5 m/s | 5.7 |
| 2005 | 17.5°C | 16.9°C | 16.2°C | 20.8°C | 14.0°C | 68 mm | 87% | 4.9 m/s | 5.2 |
| 2004 | 16.1°C | 15.5°C | 14.8°C | 17.9°C | 13.0°C | 76 mm | 86% | 4.8 m/s | 5.1 |
| 2003 | 17.5°C | 16.8°C | 16.2°C | 20.3°C | 15.1°C | 109 mm | 86% | 5.2 m/s | 4.7 |
| 2002 | 15.8°C | 15.2°C | 14.6°C | 17.4°C | 12.4°C | 64 mm | 89% | 4.8 m/s | 5.2 |
| 2001 | 16.8°C | 16.2°C | 15.5°C | 21.5°C | 13.5°C | 79 mm | 87% | 4.5 m/s | 5 |
| 2000 | 16.4°C | 15.7°C | 15.0°C | 18.7°C | 13.0°C | 49 mm | 88% | 5 m/s | 5.8 |
| 1999 | 17.4°C | 16.7°C | 15.9°C | 19.1°C | 14.8°C | 13 mm | 87% | 4.7 m/s | 5.9 |
| 1998 | 16.0°C | 15.5°C | 15.0°C | 16.9°C | 14.2°C | 66 mm | 89% | 6 m/s | 5 |
| 1997 | 16.8°C | 16.0°C | 15.3°C | 19.5°C | 10.7°C | 36 mm | 88% | 4.2 m/s | 5.6 |
| 1996 | 16.4°C | 15.8°C | 15.1°C | 18.5°C | 12.5°C | 25 mm | 87% | 5.1 m/s | 5.8 |
| 1995 | 17.8°C | 17.2°C | 16.5°C | 20.1°C | 14.0°C | 31 mm | 87% | 4.8 m/s | 5.5 |
| 1994 | 16.6°C | 16.0°C | 15.3°C | 18.3°C | 13.9°C | 61 mm | 88% | 4.6 m/s | 5.4 |
| 1993 | 15.7°C | 15.2°C | 14.6°C | 16.6°C | 13.1°C | 92 mm | 88% | 5.9 m/s | 5.2 |
| 1992 | 17.0°C | 16.3°C | 15.6°C | 18.6°C | 14.6°C | 59 mm | 87% | 5.1 m/s | 5.1 |
| 1991 | 16.0°C | 15.3°C | 14.7°C | 18.6°C | 13.7°C | 62 mm | 91% | 5.4 m/s | 4.9 |
| 1990 | 17.1°C | 16.3°C | 15.5°C | 19.9°C | 13.0°C | 48 mm | 85% | 5.6 m/s | 6.6 |
| 1989 | 18.5°C | 17.7°C | 16.8°C | 21.6°C | 15.0°C | 28 mm | 86% | 4.5 m/s | 6 |
| 1988 ❄️ | 15.3°C | 14.7°C | 14.1°C | 16.4°C | 13.1°C | 91 mm | 87% | 6.5 m/s | 5 |
| 1987 | 16.8°C | 16.1°C | 15.4°C | 18.6°C | 13.3°C | 48 mm | 86% | 4.7 m/s | 5.6 |
| 1986 | 16.2°C | 15.6°C | 15.1°C | 17.3°C | 13.9°C | 53 mm | 87% | 4.8 m/s | 4.8 |
| 1985 | 16.6°C | 15.8°C | 15.1°C | 19.1°C | 13.7°C | 52 mm | 86% | 5 m/s | 5.2 |
| 1984 | 17.8°C | 16.8°C | 15.9°C | 19.6°C | 13.7°C | 32 mm | 83% | 4.4 m/s | 6.1 |
| 1983 🔥 | 19.2°C | 18.2°C | 17.2°C | 24.1°C | 13.1°C | 30 mm | 86% | 4.2 m/s | — |
| 1982 | 17.0°C | 16.2°C | 15.3°C | 19.3°C | 13.2°C | 51 mm | 88% | 4.1 m/s | — |
| 1981 | 16.3°C | 15.7°C | 15.1°C | 18.8°C | 13.7°C | 61 mm | 88% | 5.7 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 17°C with lows near 15.6°C (mean 16.3°C), based on 45 years of NASA POWER data.
July averages 65 mm of rainfall in Penzance, one of the drier months. The wettest on record was 177 mm in 2009.
The hottest July reached 24.1°C in 1983. The coldest dipped to 10.7°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.4°C. Daytime highs moved from 17.4°C to 17.5°C and overnight lows from 15.7°C to 16.3°C over the same span.
July is one of the warmer months of the year in Penzance and one of the drier months, so plan for around 17°C daytime highs and 15.6°C at night.
Not quite — July is the 11th coolest month in Penzance, averaging 16.3°C.
For July in Penzance, pack light layers you can adjust through the day, with typical highs of 17°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 87% — quite humid.
Average wind speed in July is 5.1 m/s. The windiest July on record averaged 6.7 m/s (2009).
The wettest July on record was 2009 with 177 mm. On average, July sees 65 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Penzance behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
